Computer Programing Languages

import java.awt.*;

import javax.swing.*;

import java.io.*;

import java.util.regex.*;

import java.awt.event.*;

class login1 extends JFrame implements ActionListener,KeyListener,FocusListener

{

int cnt=0;

String str1,uname,upass,ans,answer,name;

String password;

Boolean flag=false,flag1=false;

String opass,npass,cpass;

String que;

JLabel l1=new JLabel("Username :");

JLabel l2=new JLabel("Password :");

JLabel qu=new JLabel(" ");

JTextField t1=new JTextField(20);

JPasswordField t2=new JPasswordField(20);

ImageIcon image1=new ImageIcon("login.jpg");

JButton login=new JButton(image1);

ImageIcon image2=new ImageIcon("for.jpg");

JButton forget=new JButton(image2);

ImageIcon image3=new ImageIcon("change.jpg");

JButton change=new JButton(image3);

JButton recover=new JButton("RecoverPassword");

JLabel jb=new JLabel();

JLabel jl=new JLabel("Username :");

JTextField tf=new JTextField(15);

JLabel qq=new JLabel("Question :");

JLabel j2=new JLabel("Answer :");

JTextField tf2=new JTextField(15);

JPasswordField oldpass=new JPasswordField(15);

JPasswordField newpass=new JPasswordField(15);

JPasswordField confirm=new JPasswordField(15);

JTextField uname1=new JTextField(15);

JButton changepass=new JButton("ChangePassword");

Font f;

JFrame frame;

login1(String str)

{

super(str);

JPanel p=new JPanel(new GridLayout(2,2));

setSize(700,300);

JPanel p1=new JPanel(new GridLayout(1,3));

JPanel p2=new JPanel();

Insets insets = new Insets(0,1,0,0);

forget.setMargin(insets);

change.setMargin(insets);

forget.setToolTipText("Recover Password");

change.setToolTipText("Change Password");

p1.add(login);

p1.add(forget);

p1.add(change);

p2.add(p1);

p2.setBounds(0,70,650,100);

add(p2);

JPanel p3=new JPanel();

p.add(l1);

p.add(t1);

p.add(l2);

p.add(t2);

p3.add(p);

add(p3,BorderLayout.CENTER);

setResizable(false);

forget.addActionListener(this);

forget.addKeyListener(this);

change.addKeyListener(this);

change.addActionListener(this);

recover.addActionListener(this);

recover.addKeyListener(this);

changepass.addActionListener(this);

changepass.addKeyListener(this);

tf.addFocusListener(this);

oldpass.addFocusListener(this);

newpass.addFocusListener(this);

confirm.addFocusListener(this);

uname1.addFocusListener(this);

str1="Well Come";

}

public boolean validdateuserandpass(String f,String use,String pass)

{

try

{

File infile=new File(f);

int flag=0;

BufferedReader br=new BufferedReader(new FileReader(f));

String uname=null;

while((uname=br.readLine())!=null)

{

uname=uname.trim();

Pattern pat=Pattern.compile("/");

String str[]=pat.split(uname);

if(str[0].equals(use) && str[1].equals(pass))

{

flag++;

break;

}

else

{

flag=0;

}

br.close();

if(flag>0)

{

return true;

}

else

{

return false;

}

catch(Exception e)

{

System.out.println(e);

}

return true;

}

public void changepassword(String f,String oldp,String newp,String use)

{

int flag=0,flag1=0;

try

{

File infile=new File(f);

BufferedReader br=new BufferedReader(new FileReader(f));

File tempFile=new File(infile.getAbsolutePath() + ".tmp");

PrintWriter pw=new PrintWriter(new FileWriter(tempFile));

String uname=null;

while((uname=br.readLine())!=null)

{

uname=uname.trim();

Pattern pat=Pattern.compile("/");

String str[]=pat.split(uname);

if(str[0].equals(use))

{

flag++;

if(str[1].equals(oldp))

{

name=str[0];

password=str[1];

flag1++;

str[1]=newp;

uname=str[0]+"/"+str[1]+"/"+str[2]+"/"+str[3];

//break;

}

pw.println(uname);

pw.flush();

}

pw.close();

br.close();

if(!infile.delete())

{

System.out.println("Could not delete file");

return;

}

if(!tempFile.renameTo(infile))

{

System.out.println("Could not rename file");

}

if(flag==0)

{

JOptionPane.showMessageDialog(frame,"Invalid Username");

}

else if(flag1==0)

{

JOptionPane.showMessageDialog(frame,"Invalid Password");

}

else if(flag>0 && flag1>0)

{

JOptionPane.showMessageDialog(frame,"Password Successfully Changed");

frame.dispose();

}

catch(Exception e)

{

System.out.println(e);

}

public boolean forgetpassword(String f,String use)

{

try

{

int flag=0;

File infile=new File(f);

BufferedReader br=new BufferedReader(new FileReader(f));

String uname=null;

while((uname=br.readLine())!=null)

{

uname=uname.trim();

Pattern pat=Pattern.compile("/");

String str[]=pat.split(uname);

if(str[0].equals(use))

{

que=str[2];

ans=str[3];

password=str[1];

name=str[0];

flag++;

break;

}

else

{

flag=0;

}

br.close();

if(flag>0)

{

return true;

}

else

{

return false;

}

catch(Exception e)

{

System.out.println(e);

}

return true;

}

public void keyTyped(KeyEvent ke)

{}

public void keyReleased(KeyEvent ke)

{}

public void keyPressed(KeyEvent ke)

{

if(ke.getSource().equals(recover))

{

answer=tf2.getText();

uname=tf.getText();

if(!uname.equals(name) && !uname.equals(""))

{

JOptionPane.showMessageDialog(frame,"Invalid Username");

}

else if(uname.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please First Enter Username");

}

else

{

if(answer.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please First Enter Answer");

}

else

{

if(answer.equals(ans))

{

JOptionPane.showMessageDialog(frame,"Your Password is " + password);

frame.dispose();

}

else

{

JOptionPane.showMessageDialog(frame,"Incorrect Answer please try again");

}

if(ke.getSource().equals(login))

{

uname=t1.getText();

upass=t2.getText();

if(validdateuserandpass("login.txt",uname,upass))

{

frame=new JFrame("Wellcome" );

f=new Font(str1,Font.PLAIN,20);

setFont(f);

frame.setSize(500,200);

frame.setVisible(true);

str1+= " "+ uname;

jb.setText(str1);

JPanel p1=new JPanel();

p1.add(jb);

frame.add(p1);

frame.setResizable(false);

dispose();

}

else

{

JOptionPane.showMessageDialog(login,"Invalid Username & Password");

}

if(ke.getSource().equals(forget))

{

frame=new JFrame("ForgetPassword");

frame.setSize(600,200);

tf2.setText("");

tf.setText("");

qu.setText("");

JPanel p=new JPanel(new GridLayout(1,2));

JPanel p1=new JPanel();

JPanel p2=new JPanel(new GridLayout(2,2));

JPanel p3=new JPanel();

JPanel p4=new JPanel(new GridLayout(1,1));

JPanel p5=new JPanel();

p2.add(qq);

p2.add(qu);

p2.add(j2);

p2.add(tf2);

p3.add(p2);

p3.setBounds(10,60,600,150);

frame.add(p3,BorderLayout.CENTER);

p4.add(recover);

p5.add(p4);

p5.setBounds(10,110,600,150);

frame.add(p5);

p.add(jl);

p.add(tf);

p1.add(p);

frame.add(p1,BorderLayout.CENTER);

frame.setResizable(false);

frame.setVisible(true);

}

if(ke.getSource().equals(change))

{

frame=new JFrame("ChangePassword");

frame.setSize(500,200);

uname1.setText("");

oldpass.setText("");

newpass.setText("");

confirm.setText("");

jl.setText("UserName : ");

jb.setText("OldPassword :");

qq.setText("NewPassword :");

j2.setText("Confirm : ");

JPanel p1=new JPanel(new GridLayout(4,2));

JPanel p2=new JPanel();

JPanel p3=new JPanel(new GridLayout(1,1));

JPanel p4=new JPanel();

p3.add(changepass);

p4.add(p3);

p4.setBounds(0,90,500,175);

frame.add(p4);

p1.add(jl);

p1.add(uname1);

p1.add(jb);

p1.add(oldpass);

p1.add(qq);

p1.add(newpass);

p1.add(j2);

p1.add(confirm);

p2.add(p1);

frame.add(p2,BorderLayout.CENTER);

frame.setResizable(false);

frame.setVisible(true);

}

if(ke.getSource().equals(changepass))

{

uname=uname1.getText();

opass=oldpass.getText();

npass=newpass.getText();

cpass=confirm.getText();

if(uname.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please Enter the Username");

}

else if(opass.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please Enter the OldPassword");

}

else if(npass.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please Enter the NewPassword");

}

else if(cpass.equals(npass))

{

changepassword("login.txt",opass,npass,uname);

}

else

{

JOptionPane.showMessageDialog(frame,"NewPassword and ConfirmPassword not matched");

}

public void focusLost(FocusEvent te)

{

if(te.getSource().equals(tf))

{

uname=tf.getText();

if(forgetpassword("login.txt",uname))

{

qu.setText(que);

}

else

{

if(frame.isVisible())

{

JOptionPane.showMessageDialog(frame,"Incorrect Username");

tf.setText("");

}

if(te.getSource().equals(uname1))

{

uname=uname1.getText();

flag1=forgetpassword("login.txt",uname);

if(flag1)

{

uname1.setEnabled(false);

}

else

{

if(frame.isVisible())

{

JOptionPane.showMessageDialog(frame,"Incorrect Username");

uname1.setText("");

}

if(te.getSource().equals(oldpass))

{

uname=uname1.getText();

opass=oldpass.getText();

npass=newpass.getText();

cpass=confirm.getText();

flag=validdateuserandpass("login.txt",uname,opass);

if(flag)

{

oldpass.setEnabled(false);

}

else if(flag1)

{

if(frame.isVisible())

{

JOptionPane.showMessageDialog(frame,"Password not Matched");

oldpass.setText("");

}

if(te.getSource().equals(newpass))

{

npass=newpass.getText();

if(npass.equals("") && flag)

{

if(frame.isVisible())

{

JOptionPane.showMessageDialog(frame,"Please enter the

NewPassword");

newpass.setText("");

}

else if(flag)

{

newpass.setEnabled(false);

}

if(te.getSource().equals(confirm))

{

npass=newpass.getText();

cpass=confirm.getText();

if(cpass.equals(npass) && !npass.equals(""))

{

confirm.setEnabled(false);

}

else if(!npass.equals(""))

{

if(frame.isVisible())

{

JOptionPane.showMessageDialog(frame,"NewPassword and ConfirmPassword not Matched");

newpass.setEnabled(true);

newpass.setText("");

confirm.setText("");

}

public void focusGained(FocusEvent te)

{

}

public void actionPerformed(ActionEvent ae)

{

uname=t1.getText();

upass=t2.getText();

if(ae.getSource().equals(login))

{

if(validdateuserandpass("login.txt",uname,upass))

{

frame=new JFrame("Wellcome" );

f=new Font(str1,Font.PLAIN,20);

setFont(f);

frame.setSize(500,200);

frame.setVisible(true);

str1+= " "+ uname;

jb.setText(str1);

JPanel p1=new JPanel();

p1.add(jb);

frame.add(p1);

frame.setResizable(false);

dispose();

}

else

{

JOptionPane.showMessageDialog(login,"Invalid Username & Password");

}

if(ae.getSource().equals(forget))

{

frame=new JFrame("ForgetPassword");

frame.setSize(600,200);

tf2.setText("");

tf.setText("");

qu.setText("");

JPanel p=new JPanel(new GridLayout(1,2));

JPanel p1=new JPanel();

JPanel p2=new JPanel(new GridLayout(2,2));

JPanel p3=new JPanel();

JPanel p4=new JPanel(new GridLayout(1,1));

JPanel p5=new JPanel();

p2.add(qq);

p2.add(qu);

p2.add(j2);

p2.add(tf2);

p3.add(p2);

p3.setBounds(10,60,600,150);

frame.add(p3,BorderLayout.CENTER);

p4.add(recover);

p5.add(p4);

p5.setBounds(10,110,600,150);

frame.add(p5);

p.add(jl);

p.add(tf);

p1.add(p);

frame.add(p1,BorderLayout.CENTER);

frame.setResizable(false);

frame.setVisible(true);

}

if(ae.getSource().equals(recover))

{

answer=tf2.getText();

uname=tf.getText();

if(!uname.equals(name) && !uname.equals(""))

{

JOptionPane.showMessageDialog(frame,"Invalid Username");

}

else if(uname.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please First Enter Username");

}

else

{

if(answer.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please First Enter Answer");

}

else

{

if(answer.equals(ans))

{

JOptionPane.showMessageDialog(frame,"Your Password is " + password);

frame.dispose();

}

else

{

JOptionPane.showMessageDialog(frame,"Incorrect Answer please try again");

}

if(ae.getSource().equals(change))

{

frame=new JFrame("ChangePassword");

frame.setSize(500,200);

oldpass.setEnabled(true);

uname1.setEnabled(true);

newpass.setEnabled(true);

confirm.setEnabled(true);

uname1.setText("");

oldpass.setText("");

newpass.setText("");

confirm.setText("");

jl.setText("UserName : ");

jb.setText("OldPassword :");

qq.setText("NewPassword :");

j2.setText("Confirm : ");

JPanel p1=new JPanel(new GridLayout(4,2));

JPanel p2=new JPanel();

JPanel p3=new JPanel(new GridLayout(1,1));

JPanel p4=new JPanel();

p3.add(changepass);

p4.add(p3);

p4.setBounds(0,90,500,175);

frame.add(p4);

p1.add(jl);

p1.add(uname1);

p1.add(jb);

p1.add(oldpass);

p1.add(qq);

p1.add(newpass);

p1.add(j2);

p1.add(confirm);

p2.add(p1);

frame.add(p2,BorderLayout.CENTER);

frame.setResizable(false);

frame.setVisible(true);

}

if(ae.getSource().equals(changepass))

{

uname=uname1.getText();

opass=oldpass.getText();

npass=newpass.getText();

cpass=confirm.getText();

if(uname.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please Enter the Username");

}

else if(opass.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please Enter the OldPassword");

}

else if(npass.equals(""))

{

JOptionPane.showMessageDialog(frame,"Please Enter the NewPassword");

}

else if(cpass.equals(npass))

{

changepassword("login.txt",opass,npass,uname);

}

else

{

JOptionPane.showMessageDialog(frame,"NewPassword and ConfirmPassword not Matched");

}

public static void main(String args[])

{

Image image;

login1 l=new login1("Login");

l.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Toolkit tool = Toolkit.getDefaultToolkit();

image=tool.getImage("Login.png");

l.setIconImage(image);

l.setVisible(true);

}

/*Notepad File

Hetal/Adhvaryu/Who is your best Friend ?/Sneha

Avni/goenka/What is your favourite book ?/Java

dhruvil/shah/What is id no ?/123

manish/dalwadi/What was the name of your First Teacher ?/Hiral

OUTPUT :=

=======

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Computer Programing Languages

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Thursday, 28 June 2012

java project : login page

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